Of all the hosts of Eurotas the Troias were the most fell. For they were born of Winter. Between the Solar Array Pumped Laser and Troy , the two trillion ton nickel-iron battlestation created by eccentric billionaire Tyler Vernon, Earth has managed to recapture the Sol system from their Horvath conquerors and begin entering the galactic millieu. But when the Rangora Empire rapidly crushes humanity's only ally it becomes clear the war is just beginning. At the heart of nickel iron and starlight are the people, Marines, Navy and civilians, who make Troy a living, breathing, engine of war. Survivors of apocalypse, they know the cost of failure. If this Troy falls, no one will be left to write the epic. Citadelcontinues the saga begun in Live Free or Die, following the paths of several characters during the first years of The Spiral Arm Wars culminating in the First Battle of E Eridani.

John Ringo began writing for Baen in 2000 with his first release A Hymn Before Battle—the first novel in his Posleen Wars—which has become a New York Times best-selling series with nearly one million copies in print. The series continued with Gust Front, When the Devil Dances, Hell’s Faire and Eye of the Storm. In addition, Ringo has penned the Council War series: There Will be Dragons, Emerald Sea, Against the Tide, and East of the Sun, West of the Moon. Adding another dimension to his skills, Ringo created nationally best-selling techno-thriller novels about Mike Harmon (Ghost, Kildar, Choosers of the Slain, Unto the Breach, and A Deeper Blue). His latest techno-thriller, The Last Centurion, was also a national best seller. A more playful twist is the Looking-Glass series: Into the Looking Glass, Vorpal Blade, Manxome Foe and Claws That Catch, the last three in collaboration with Travis S. Taylor. His audience was further enhanced with four collaborations with fellow New York Times best-selling author David Weber: March Upcountry, March to the Sea, March to the Stars and We Few. There are an additional five collaborative spinoffs from the Posleen series: The Hero, written with Michael Z. Williamson, Watch on the Rhine, Yellow Eyes and The Tuloriad, all written with Tom Kratman, and the New York Times best seller Cally’s War and its sequels Sister Time and Honor of the Clan, both with Julie Cochrane. A veteran of the 82nd Airborne, he brings first-hand knowledge of military operations to his fiction.